Flush for toilets

ABSTRACT

The invention relates to a flush for toilets containing a container with an air vessel, a connection piece for the network, a connection piece for the flush, a valve housing comprising a control device and an injector tube. A suction device is joined to the injector tube. The flush is characterized in that an air-refilling opening ( 7 ) is arranged in the valve housing ( 6 ) underneath the control device ( 10 ) that is suitably accommodated in the valve housing ( 6 ). A jet tube ( 15 ) is arranged above the control device in order to deviate the flushing water. An air-introducing chamber ( 5 ) is arranged in and/or next to the jet tube ( 15 ).

[0001] This is a continuation of PCT/HU99/00080.

DESCRIPTION

[0002] Subject of the invention is a flushing device for toiletscontaining a container with an air vessel, a connection piece for thenetwork, a connecting pipe end for the valve, a connecting pipe end forthe flush, a valve housing with a control device and jet tube. The jettube is connected with the suction device.

[0003] Many devices for the flushing of toilets are known. Thetraditional flushing devices are in detail described in the book “Watersupply, sewerage, gas supply” by Ballai-Marton (Technical Edition,Budapest 1977), page 593-599. Traditional flushing devices are equippedwith an open water container with a volume of about 8 l, a water floatand a weighted valve. When operated the whole quantity of water must rundown from the container and for this reason these devices areeconomically disadvantageous. A braked, rapid stop cock is also known,which is directly joined in the network and flushes the pan from aheight of about 700 mm. A disadvantage of this solution is that itrequires a larger water branch (with a diameter of ¾-1″) and thus theeffect of flushing mainly depends on the pressure in the water conduct.

[0004] Further on, in case of a pressure drop and a breakdown the sewagemay be sucked back.

[0005] Closed containers with an air vessel at flushing also make use ofthe pressure in the water conduct. Such a solution is described in thepatent documents HU 174,527, HU 190,422 and FR 2,122,069. The drawbackof this solution is, that the air is continuously escaping from thepressure container. After a certain time the container loses itsaircushion and operates as a valve being connected with the waternetwork without a container. That means that compensation of the aircushion requires maintenance.

[0006] The U.S. Pat. No. 5,046,201 discloses a pressure container with apressure control device where water feeds the injector, which is suckingair into the air vessel. The flush valve is provided with bars. Thepublication WO 98/39522 discloses a flushing system with a multiplevalve under pressure. The U.S. Pat. No. 5,136,732 contains flushingdevices with a piston and a needle valve. The patent document JP6,158,699 discloses a pressure container with a vacuum valve. The patentdocument HU 205,409 describes a flushing device with an injector and aspring loaded and weight loaded external valve to introduce air. Acommon disadvantage of these solutions is, that they are relativelycomplicated, that the different valves and pressure controls aresubmitted to the forming of scale and choking, that means that they allneed maintenances.

[0007] Purpose of the invention is the elimination of the existingdisadvantages, development of a flushing device needing no maintenanceand no introduction of air by the operator, which is silent, watersaving and absolutely reliable in service.

[0008] Base of the idea being subject of the invention is therecognition that if the supply of air during the flushing process issolved through an opening without moving parts und if for theintroduction of air the stream of the flushing water is deflected andstabilized, a more advantageous solution can be reached than up to now.

[0009] According to the purpose of the invention the device according tothe invention is a flushing device for toilets comprising a containerwith an air vessel, a connecting pipe end for the network, a flushingpipe end, a valve housing provided with a control device and a jet tube,a suction device being connected with the jet tube in a way that on thehousing of the valve beneath the control device an air refill opening isprovided whereas above the control device—preferably inserted into thevalve housing—an appropriate jet tube is arranged to deflect theflushing water, within the jet tube and/or beside it an air inletchamber being left free.

[0010] Another characteristic of the invention may be that the suctiondevice in the bottom part of the jet tube is provided at least with oneinlet pipe end discharging into the container. The air inlet chamber issurrounded by a vault conducting the air to the air vessel.

[0011] In one embodiment of the invention the part of the jet pipeprotruding into the valve housing contains a stabilizing chamber, whichdetermines the direction of the water jet. The injector pipe, thesuction device, the jet tube and the flushing pipe end are coaxial.

[0012] In another embodiment a complementary unit is built in betweenthe suction device and the jet tube with a suction throat suitable toincrease the yield of water. The complementary unit surrounds theintegrating chamber.

[0013] The flushing device for toilets according to the invention hasmany advantages. It is extraordinarily simple and reliable in service,besides the control device by means of which the user starts and stopsflushing it contains no moving parts. The device needs no maintenanceand contains no parts subjected to scale or choking. Its functioning isnoiseless and water saving. The user can stop flushing at any time. Theintroduction of air during the flushing process works automatically.

[0014] The application of an air refill opening has the advantage that avalve preventing back suction is not necessary. In case of a trouble theair refill opening cuts the suction effect and prevents the sewage frompossible penetration into the water network.

[0015] In the following we present a more detailed description of theinvention on the base of the enclosed drawings. The drawings present:

[0016]FIG. 1: Longitudinal section of the device

[0017]FIG. 2: Cross-section of the jet tube at 14 in FIG. 1.

[0018]FIG. 3: Cross-section of the jet tube over the suction device.

[0019] In FIG. 1 the container is shown in vertical position. At the topthe connecting pipe end 2 for the network is arranged, the upper part ofthe container is being the air vessel 17. The actual water level ismarked by a triangle. The container 1 can be made of plastics, of metalor of a combination of both of them. It can be made of one or of morepieces. The injector tube 3 is arranged in the longitudinal axis of thecontainer 1 and can be of a narrow shape or have a diameter according toFIG. 1. The suction device is in the lower part of the injector tube 3and has two inlet pipe ends 12 discharging into the container 1. Thesuction device 4 and the injector tube 3 are coaxial. In some cases thelower part of the injector tube 3 is choked.

[0020] The valve housing 6 is beneath the container 1 and preferablyjoins with the flushing pipe end 11. In case of need the valve house isintegrated with the container. The control device 10 can be a simpleshut-off valve or a valve with remote control. Beneath the controldevice 10 the air refill opening 7 is arranged. Between the suctiondevice 4 and the control device 10 the jet tube 15 is arranged which issuitable for the deflection of the flushing water. The jet tube 15surrounds the stabilizing chamber 14 beside him the air flows in the airinlet chamber 5. The air inlet chamber 5 is at the top surrounded by theguide vault 16, which directs the air into the pressure vessel 17. Thejet tube 15 and the flush pipe end 11 are preferably coaxial. Thecomplementary unit 8 is inserted between the injector pipe 3 and the jettube 15. The complementary unit 8 joins in the container 1 through thesuction throat 13 suitable for increasing the water yield. Thecomplementary unit 8 surrounds the collecting chamber 9.

[0021]FIG. 2 shows the cross section of the jet tube 15 with the airinlet chamber 5. FIG. 3 shows the cross section of the injector pipe 3with the inlet pipe end 12 of the suction device 4. Another embodimentis also possible in which the injector pipe 3 is connected with the jettube 15 without the complementary unit 8. The complementary unit servesfor increasing the efficiency of the suction device 4 as a secondaryelement. The suction device 4, the injector pipe 3 and the complementaryunit 8, applied according to need, are together named “water jet pump”.Within the framework of the claim hereafter specified the flushingdevice according to the present invention can also be made in otherembodiments, e.g. the suction device 4 can also been arranged beneaththe injector pipe 3.

[0022] Functioning of the flushing device according to the invention:

[0023] In FIG. 1 the path of the water is marked by an arrow, the pathof the air by a hatched arrow. The user opens the control device 10. Inthe moment of opening the pressure in the air vessel 17 corresponds withthe pressure in the water conduct. At the beginning of the flushing thewater flows out of the container and the pressure in the air vessel 17is gradually decreasing. As the pressure is falling the fresh water fromthe water conduct is flowing into the injector pipe 3 at a graduallyincreasing pressure. The water streaming into the injector pipe 3exercises a sucking effect on the suction device 4 and the complementaryunit 8 whereby the water in the container 1 through the inlet pipe end12 and the suction throat 13 joins the main stream and mixes with it inthe collecting chamber 9.

[0024] The decrease of the quantity of water in the container originatesa vacuum in the air vessel 17. As a result of the pressure differenceair is streaming into the air vessel 17 through the air refill opening 7and the air inlet chamber 5, which automatically compensates the airlost with the flushing water. The water in the container joining thewater from the conduct under the effect of the injector in thestabilizing chamber 14 of the jet tube 15 assumes the cross section ofthe stabilizing chamber and while it flows through the control device 10it nearly retains it. The rim of the water stream is marked by a dashedline. Owing to the shape of the jet tube 15 the water stream does notentirely fill up the cross section of the control device 10 and thevalve housing 6 and thereby promotes the introduction of air in to theair vessel 17.

[0025] After the flushing process is finished the control device 10 isbeing closed. Now the water from the network is filling the container 1through the injector pipe 3 until the pressure in the air vessel 17 isequal to the pressure in the water conduct.

[0026] The flushing device according to the invention is used for watersaving and reliable flushing of toilets.

What is claimed by the inventors:
 1. Flushing device for toiletscomprising a container with an air vessel, a connecting pipe end for thenetwork, a flushing pipe end, a valve housing with a control device andan injector tube, a suction device being connected with the injectortube characterized in that on the valve housing (6) beneath the controldevice (10) an air-refill opening (7) is arranged, whereas above thecontrol device (10)—preferably integrated in the valve housing (6)—thejet tube (15) is built in to the guide the flushing water, neverthelessleaving free an air inlet chamber (5) in the jet tube (15) and/or besideit.
 2. Flushing device according to claim 1, characterized in that thesuction device (4) is inserted in the lower part of the injector pipe(3) having at least one inlet pipe end (12) discharging into thecontainer (1).
 3. Flushing device according to claim 1, characterized inthat the air inlet chamber (5) is limited by the guide vault (16),guiding the water to the air vessel (17).
 4. Flushing device accordingto claim 1, characterized in that the part of the jet tube (15)protruding into the valve housing (6) contains a stabilizing chamber(14) which determines the direction of the water stream.
 5. Flushingdevice according to claim 1, characterized in that the injector pipe(3), the suction device (4), the jet tube (15) and the flushing pipe end(11) are coaxial.
 6. Flushing device according to claim 1, characterizedin that between the suction device (4) and the jet tube (15) acomplementary unit (8) is built in, the complementary unit (8) beingprovided with a suction throat (13) suitable to increase the wateryield.
 7. Flushing device according to claim 6, characterized in thatthe complementary unit (8) is surrounded by a collecting chamber (9).